2014
DOI: 10.48550/arxiv.1408.0934
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Optimal single shot strategies for discrimination of quantum measurements

Michal Sedlak,
Mario Ziman

Abstract: We study discrimination of m quantum measurements in the scenario when the unknown measurement with n outcomes can be used only once. We show that ancilla-assisted discrimination procedures provide a nontrivial advantage over simple (ancilla-free) schemes for perfect distinguishability and we prove that inevitably m ≤ n. We derive necessary and sufficient conditions of perfect distinguishability of general binary measurements. We show that the optimization of the discrimination of projective qubit measurements… Show more

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